DatasheetsPDF.com

UPC1935 Dataheets PDF



Part Number UPC1935
Manufacturers NEC
Logo NEC
Description DC-DC CONVERTER CONTROL IC
Datasheet UPC1935 DatasheetUPC1935 Datasheet (PDF)

DATA SHEET BiCMOS INTEGRATED CIRCUIT µ PC1935 DC-DC CONVERTER CONTROL IC DESCRIPTION The µ PC1935 is a low-voltage input DC-DC converter control IC that can configure a three-output (step-up × 2, inverted output × 1) DC-DC converter at an input voltage of 3, 3.3, or 5 V. Because of its wide operating voltage range, this IC can also be used to control DC-DC converters using an AC adapter for input. FEATURES • Low supply voltage: 2.5 V (MIN.) • Operating voltage range: 2.5 to 20 V (breakdown .

  UPC1935   UPC1935



Document
DATA SHEET BiCMOS INTEGRATED CIRCUIT µ PC1935 DC-DC CONVERTER CONTROL IC DESCRIPTION The µ PC1935 is a low-voltage input DC-DC converter control IC that can configure a three-output (step-up × 2, inverted output × 1) DC-DC converter at an input voltage of 3, 3.3, or 5 V. Because of its wide operating voltage range, this IC can also be used to control DC-DC converters using an AC adapter for input. FEATURES • Low supply voltage: 2.5 V (MIN.) • Operating voltage range: 2.5 to 20 V (breakdown voltage: 30 V) • Can control three output channels. • Timer latch circuit for short-circuit protection. • Ceramic capacitor with low capacitance (0.1 µ F) can be used for short-circuit protection. • Dead times of channels 2 (step-up) and 3 (inverted output) can be set from external resistors. Dead time of channel 1 (step-up) is internally fixed to 85 %. • Soft start of each channel can be set independently. • Each channel can be turned ON/OFF independently. ORDERING INFORMATION Part Number Package 16-pin plastic TSSOP (5.72 mm (225)) µ PC1935GR The information in this document is subject to change without notice. Before using this document, please confirm that this is the latest version. Not all devices/types available in every country. Please check with local NEC representative for availability and additional information. Document No. G13418EJ3V0DS00 (3rd edition) Date Published March 2000 NS CP (K) Printed in Japan The mark 5 shows major revised points. 1998 µ PC1935 BLOCK DIAGRAM Channel 3: for inversion DTC3 16 Il3 15 FB3 14 OUT3 13 DTC2 12 Il2 11 Channel 2: for step-up FB2 10 OUT2 9 – + – – + – + + + – Internal fixed voltage Internal fixed voltage Soft start select switch + – + Internal fixed voltage – Reference voltage section Oscillation section Timer latch for short-circuit protection section + Internal fixed voltage 6 7 FB1 Channel 1: for step-up 8 OUT1 1 VCC 2 VREF 3 RT 4 GND 5 DLY II1 2 Data Sheet G13418EJ3V0DS00 µ PC1935 PIN CONFIGURATION (Top view) 16-pin plastic TSSOP (5.72 mm (225)) • µ PC1935GR VCC VREF RT GND DLY II1 FB1 OUT1 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 DTC3 II3 FB3 OUT3 DTC2 II2 FB2 OUT2 PIN FUNCTIONS Pin No. 1 2 3 4 5 Symbol VCC VREF RT GND DLY Power supply Reference voltage output Frequency setting resistor connection Ground Short-circuit protection/channel 1 soft start capacitor connection 6 7 8 II1 FB1 OUT1 Channel 1 error amplifier inverted input Channel 1 error amplifier output Channel 1 open-drain output 14 15 16 FB3 II3 DTC3 Channel 3 error amplifier output Channel 3 error amplifier inverted input Channel 3 dead time setting Function Pin No. 9 10 11 12 13 Symbol OUT2 FB2 II2 DTC2 OUT3 Function Channel 2 open-drain output Channel 2 error amplifier output Channel 2 error amplifier inverted input Channel 2 dead time setting Channel 3 open-drain output Data Sheet G13418EJ3V0DS00 3 µ PC1935 CONTENTS 1. ELECTRICAL SPECIFICATIONS ...............................................................


UPC1934 UPC1935 UPC1943


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site.
(Privacy Policy & Contact)